<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>

  <script>

    var minNum = Number.MIN_VALUE;
    alert(minNum);//5e-324

    var maxNum = Number.MAX_VALUE;
    alert(maxNum);//5e-324

    var result = Number.MAX_VALUE + Number.MAX_VALUE;
    alert(isFinite(result));//false

  </script>
</head>
<body>

</body>
</html>